Write the times in words 9 00,9 05,8 55,9 15,8 45,12 35,12 25,11 35,5 20,5 40,4 30. it's nine o'clock. it' и.т.д. это не понятно

It'd nine o'clock.
It's five minutes after nine.
It's five minutes to nine
It's quarter after nine.
It's quarter to nine
It's twelve thirty-five.
It's twenty-five past twelve
It's eleven thirty-five 
It's five twenty
It's twenty minutes to six
It's half past four